Rectifier system.



W film M I y. 4

No. 895,869. PATENTLD A UG.11, 1908 O. 0. KRUH.

RECTIFIER SYSTEM.

APPLICATION FILED DEC. 28, 1996 W! T NESS JE INK/ENTER windings or secondaries connected withyt-h UNITED sTATEs P m oral-on.

oslAs o. KRUH, or scnanao'mnr, NEW YORK, ASSiGNOR 'lO GENERAL ELECTRIC 'EOUPANY,

.A CORPORATION OF NEW YORK i ranc'rrnrnn SYSTEM.

I No. 895,869.

Specification of Letters Patent.

' Application filed December 28, 1906. Serial No. 349,792.

To'all whom it may concern;

} Be it known that I, OsiAs' O. "Karin, a subject of the-Emperor of Austria-Hun ary, residing at Schenectady, county of.. chemotady, State of New York,- have invented oer tain new and useful Improvementsin Rectifie1j;Syste ms,-of which the-following is a specificationgfl This invention relates to an improvement in electrical systems in which a vapor electricdevic'e is operated by ternatmg current source.

energyffrorn nn al- When a vapor'electricdevice, such as a rectifier, is operated by energy from a single 1* phase -alternating current source, some means must ordinarily be" provided for maintaining the rectifier ina conductive condition during the briefinterval of time when the electromotive force'of' the source passes throu h the zero value and thecurrent ,de-

.liverc to-rth'e tube ofthe vapor device is insufficientto maintain a conductive condition.

According to my present invention,- the -vapor device or rectifier is supplied with current from twoseparate windings conheated in parallel and havingvoltages suffi- 1 ciently out-of phase to. cause a continuous flow ofgcurrent through the rectifier from 7 one or the otherof a plurality of anodes. To

secure this somewhat unusual result .the two rectifier are energized'byseparate rima'rie's,

. one of them carrying current-wliic is out of phase'with thatofthe other.

'with one ofthe anode leads.

The details of my invention'will be better understood byv reference" to "the drawing forming a part of this specification, v,

; The vapor electric devices 1 maybe of ora dinary type having anodes 2 and 3 and a ,40

mercury'cathode 4, and having a starting anode 5 connected'through a resistance 6 The anodes are connected throughkonduct'ors 7 and 8 v with a pluralityof transformer secondaries 9 and 10. These transformers are connected directly in parallel and are provided with" central taps 11 and '12. by which current may be returned to the windings after passing through the load circuit 1.3.

Secondary 9 is in inductive relationewith a primary 14 connected across the single base alternating current mains 15 and '16.

is similarly he secondary -1 O energized by a primary --17-.. In

order-tosecure a displacement in phrisebg tween the current in primaries 14; and 17,

Patented Aug. 11, mos.

employ auxiliary means such as a reactance -18 in series with one of they primary circuits,"

or ISO design the primary c rcuits as to give them different time'constants. If desired;

the secondary 9. and its cooperating windin 14 may be nothin more than the windings of an ordinary'single phasetransformer-with a' reactance 1'8 'in'the primary lead]- The windings cooperate in the manner described, with a second transformer'made up offthe primary 17 and the secondary 10'.- 4 A" very considerable displacement of phase in'the" v secondaries- 9 and 10 may be produced by proper adjustment reactance 1 8, but I prefer to keep this displacement small enough, to prevent abnormal cross currents between the transformer secondaries. By sufi'iciently-d-isplacing the phases of the secondary currents an operative voltage maybe maintained on the rectifier atall times.

may be uite free from inductance. What claim as new and'desire-to secure by LettersPatent of the United States, 'is,-

' 1. The combination with a single phase alder these conditions of operation the load ternating current source, a plural ty of transformers connected thereto and having secondaries 'connected in parallel, a vapor electrlc device connected to said secondaries, and.

means for displacing the phase of the current in one transformer seconda that in th'elother i 2. The combination of a single phase alternating currentsource, a plurality of trans formers connected thereto and having secy with respect t ondaries supplying energy to a vapor electric device, and-means; tfor displacing the phase of current in one transformer primary.-

"lhe combination with a vapor electric device, a plurality of independent parallel connected windings supplying current there- 'to and'inductively'energized from a common displacing thep see of current in one of said receiving 'current therefrom of fferent .phase, secondaries for base.

therefrom, reaetive means for. displeeing the euit connected between said rectifier and said central tags. I v

6. The 00111 matron of ii source oi singlephase alternatingcurrent, a vapor electric device, transforming means connected besenses tween said source and said vapor device, and v means located between the source and said transforming means for producing an overlap of current Waves in said device.

In witness whereof, I have hereuntoset 15 my hand this 27th day of December, 1906. OSIAS O. KRUH. I Witnesses: I BENJAMIN B. HUL

[HELEN ORFORD. 

